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        <h1><a href="index.html">All files</a> index.ts</h1>
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            <div class='fl pad1y space-right2'>
                <span class="strong">78.7% </span>
                <span class="quiet">Statements</span>
                <span class='fraction'>85/108</span>
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            <div class='fl pad1y space-right2'>
                <span class="strong">67.3% </span>
                <span class="quiet">Branches</span>
                <span class='fraction'>35/52</span>
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            <div class='fl pad1y space-right2'>
                <span class="strong">73.68% </span>
                <span class="quiet">Functions</span>
                <span class='fraction'>14/19</span>
            </div>
        
            
            <div class='fl pad1y space-right2'>
                <span class="strong">82.6% </span>
                <span class="quiet">Lines</span>
                <span class='fraction'>76/92</span>
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            Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
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    <pre><table class="coverage">
<tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
<a name='L2'></a><a href='#L2'>2</a>
<a name='L3'></a><a href='#L3'>3</a>
<a name='L4'></a><a href='#L4'>4</a>
<a name='L5'></a><a href='#L5'>5</a>
<a name='L6'></a><a href='#L6'>6</a>
<a name='L7'></a><a href='#L7'>7</a>
<a name='L8'></a><a href='#L8'>8</a>
<a name='L9'></a><a href='#L9'>9</a>
<a name='L10'></a><a href='#L10'>10</a>
<a name='L11'></a><a href='#L11'>11</a>
<a name='L12'></a><a href='#L12'>12</a>
<a name='L13'></a><a href='#L13'>13</a>
<a name='L14'></a><a href='#L14'>14</a>
<a name='L15'></a><a href='#L15'>15</a>
<a name='L16'></a><a href='#L16'>16</a>
<a name='L17'></a><a href='#L17'>17</a>
<a name='L18'></a><a href='#L18'>18</a>
<a name='L19'></a><a href='#L19'>19</a>
<a name='L20'></a><a href='#L20'>20</a>
<a name='L21'></a><a href='#L21'>21</a>
<a name='L22'></a><a href='#L22'>22</a>
<a name='L23'></a><a href='#L23'>23</a>
<a name='L24'></a><a href='#L24'>24</a>
<a name='L25'></a><a href='#L25'>25</a>
<a name='L26'></a><a href='#L26'>26</a>
<a name='L27'></a><a href='#L27'>27</a>
<a name='L28'></a><a href='#L28'>28</a>
<a name='L29'></a><a href='#L29'>29</a>
<a name='L30'></a><a href='#L30'>30</a>
<a name='L31'></a><a href='#L31'>31</a>
<a name='L32'></a><a href='#L32'>32</a>
<a name='L33'></a><a href='#L33'>33</a>
<a name='L34'></a><a href='#L34'>34</a>
<a name='L35'></a><a href='#L35'>35</a>
<a name='L36'></a><a href='#L36'>36</a>
<a name='L37'></a><a href='#L37'>37</a>
<a name='L38'></a><a href='#L38'>38</a>
<a name='L39'></a><a href='#L39'>39</a>
<a name='L40'></a><a href='#L40'>40</a>
<a name='L41'></a><a href='#L41'>41</a>
<a name='L42'></a><a href='#L42'>42</a>
<a name='L43'></a><a href='#L43'>43</a>
<a name='L44'></a><a href='#L44'>44</a>
<a name='L45'></a><a href='#L45'>45</a>
<a name='L46'></a><a href='#L46'>46</a>
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<a name='L48'></a><a href='#L48'>48</a>
<a name='L49'></a><a href='#L49'>49</a>
<a name='L50'></a><a href='#L50'>50</a>
<a name='L51'></a><a href='#L51'>51</a>
<a name='L52'></a><a href='#L52'>52</a>
<a name='L53'></a><a href='#L53'>53</a>
<a name='L54'></a><a href='#L54'>54</a>
<a name='L55'></a><a href='#L55'>55</a>
<a name='L56'></a><a href='#L56'>56</a>
<a name='L57'></a><a href='#L57'>57</a>
<a name='L58'></a><a href='#L58'>58</a>
<a name='L59'></a><a href='#L59'>59</a>
<a name='L60'></a><a href='#L60'>60</a>
<a name='L61'></a><a href='#L61'>61</a>
<a name='L62'></a><a href='#L62'>62</a>
<a name='L63'></a><a href='#L63'>63</a>
<a name='L64'></a><a href='#L64'>64</a>
<a name='L65'></a><a href='#L65'>65</a>
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<a name='L74'></a><a href='#L74'>74</a>
<a name='L75'></a><a href='#L75'>75</a>
<a name='L76'></a><a href='#L76'>76</a>
<a name='L77'></a><a href='#L77'>77</a>
<a name='L78'></a><a href='#L78'>78</a>
<a name='L79'></a><a href='#L79'>79</a>
<a name='L80'></a><a href='#L80'>80</a>
<a name='L81'></a><a href='#L81'>81</a>
<a name='L82'></a><a href='#L82'>82</a>
<a name='L83'></a><a href='#L83'>83</a>
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<a name='L85'></a><a href='#L85'>85</a>
<a name='L86'></a><a href='#L86'>86</a>
<a name='L87'></a><a href='#L87'>87</a>
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<a name='L108'></a><a href='#L108'>108</a>
<a name='L109'></a><a href='#L109'>109</a>
<a name='L110'></a><a href='#L110'>110</a>
<a name='L111'></a><a href='#L111'>111</a>
<a name='L112'></a><a href='#L112'>112</a>
<a name='L113'></a><a href='#L113'>113</a>
<a name='L114'></a><a href='#L114'>114</a>
<a name='L115'></a><a href='#L115'>115</a>
<a name='L116'></a><a href='#L116'>116</a>
<a name='L117'></a><a href='#L117'>117</a>
<a name='L118'></a><a href='#L118'>118</a>
<a name='L119'></a><a href='#L119'>119</a>
<a name='L120'></a><a href='#L120'>120</a>
<a name='L121'></a><a href='#L121'>121</a>
<a name='L122'></a><a href='#L122'>122</a>
<a name='L123'></a><a href='#L123'>123</a>
<a name='L124'></a><a href='#L124'>124</a>
<a name='L125'></a><a href='#L125'>125</a>
<a name='L126'></a><a href='#L126'>126</a>
<a name='L127'></a><a href='#L127'>127</a>
<a name='L128'></a><a href='#L128'>128</a>
<a name='L129'></a><a href='#L129'>129</a>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">const U32 = Symbol(32);
const U16 = Symbol(16);
const U8 = Symbol(8);
type InputTypes = ArrayBufferView | ArrayBufferLike;
type NeedTypes = InputTypes | number | typeof U32 | typeof U16 | typeof U8;
type ReturnType&lt;T extends NeedTypes&gt; = T extends number ? Uint8Array : T extends (typeof U32 | typeof U16 | typeof U8) ? number : T;
export default class OPut {
  static U32: typeof U32 = U32;
  static U16: typeof U16 = U16;
  static U8: typeof U8 = U8;
  need?: NeedTypes | void;
  consumed = 0;
  buffer?: Uint8Array;
  resolve?: (v: any) =&gt; void;
  reject?: (err: any) =&gt; void;
  lastReadPromise?: Promise&lt;any&gt;;
  pull?: (v: any) =&gt; void;
  constructor(public g?: Generator&lt;NeedTypes, void, InputTypes | number&gt;) {
    if (g) this.need = g.next().value;
  }
<span class="fstat-no" title="function not covered" >  setG(</span>g: Generator&lt;NeedTypes, void, InputTypes | number&gt;) {
<span class="cstat-no" title="statement not covered" >    this.g = g;</span>
<span class="cstat-no" title="statement not covered" >    this.demand(g.next().value, true);</span>
  }
  consume() {
    if (this.buffer &amp;&amp; this.consumed) {
      this.buffer.copyWithin(0, this.consumed);
      this.buffer = this.buffer.subarray(0, this.buffer.length - this.consumed);
      this.consumed = 0;
    }
  }
  demand&lt;T extends NeedTypes&gt;(n: T | void, consume?: boolean): ReturnType&lt;T&gt; | undefined {
    if (consume) this.consume();
    this.need = n;
    return this.flush() as ReturnType&lt;T&gt;;
  }
  async read&lt;T extends NeedTypes&gt;(need: T) {
    if (this.lastReadPromise) {
      await this.lastReadPromise;
    }
    return this.lastReadPromise = new Promise&lt;ReturnType&lt;T&gt;&gt;((resolve, reject) =&gt; {
      this.reject = reject;
      this.resolve = (data) =&gt; {
        delete this.lastReadPromise;
        delete this.resolve;
        delete this.need;
        resolve(data);
      };
      const result = this.demand(need, true);
      <span class="missing-if-branch" title="if path not taken" >I</span>if (!result) <span class="cstat-no" title="statement not covered" >this.pull?.(need);/</span>/已饥饿，等待数据
    });
  }
  readU32(): Promise&lt;number&gt; {
    return this.read(U32);
  }
<span class="fstat-no" title="function not covered" >  readU16(</span>): Promise&lt;number&gt; {
<span class="cstat-no" title="statement not covered" >    return this.read(U16);</span>
  }
<span class="fstat-no" title="function not covered" >  readU8(</span>): Promise&lt;number&gt; {
<span class="cstat-no" title="statement not covered" >    return this.read(U8);</span>
  }
  close() {
    if (this.g) this.g.return();
    <span class="missing-if-branch" title="if path not taken" >I</span>if (this.buffer) <span class="cstat-no" title="statement not covered" >this.buffer.subarray(0, 0);</span>
    this.reject<span class="branch-1 cbranch-no" title="branch not covered" >?.(new Error('EOF'));</span>
    delete this.lastReadPromise;
  }
  flush(): InputTypes | number | undefined {
    if (!this.buffer || !this.need) return;
    let returnValue: ReturnType&lt;typeof this.need&gt; | null = null;
    const unread = this.buffer.subarray(this.consumed);
    let n = 0;
    const notEnough = (x: number) =&gt; unread.length &lt; (n = x);
    if (typeof this.need === 'number') {
      <span class="missing-if-branch" title="if path not taken" >I</span>if (notEnough(this.need)) <span class="cstat-no" title="statement not covered" >return;</span>
      returnValue = unread.subarray(0, n);
    } else if (this.need === U32) {
      <span class="missing-if-branch" title="if path not taken" >I</span>if (notEnough(4)) <span class="cstat-no" title="statement not covered" >return;</span>
      returnValue = (unread[0] &lt;&lt; 24) | (unread[1] &lt;&lt; 16) | (unread[2] &lt;&lt; 8) | unread[3];
    } else <span class="missing-if-branch" title="if path not taken" >I</span>if (this.need === U16) {
<span class="cstat-no" title="statement not covered" >      <span class="missing-if-branch" title="if path not taken" >I</span>if (notEnough(2)) <span class="cstat-no" title="statement not covered" >return;</span></span>
<span class="cstat-no" title="statement not covered" >      returnValue = (unread[0] &lt;&lt; 8) | unread[1];</span>
    } else <span class="missing-if-branch" title="if path not taken" >I</span>if (this.need === U8) {
<span class="cstat-no" title="statement not covered" >      <span class="missing-if-branch" title="if path not taken" >I</span>if (notEnough(1)) <span class="cstat-no" title="statement not covered" >return;</span></span>
<span class="cstat-no" title="statement not covered" >      returnValue = unread[0];</span>
    } else if (!('buffer' in this.need)) {
      <span class="missing-if-branch" title="if path not taken" >I</span>if (notEnough(this.need.byteLength)) <span class="cstat-no" title="statement not covered" >return;</span>
      new Uint8Array(this.need).set(unread.subarray(0, n));
      returnValue = this.need;
    } else if ('byteOffset' in this.need) {
      if (notEnough(this.need.byteLength - this.need.byteOffset)) return;
      new Uint8Array(this.need.buffer, this.need.byteOffset).set(unread.subarray(0, n));
      returnValue = this.need;
    } else <span class="cstat-no" title="statement not covered" ><span class="missing-if-branch" title="if path not taken" >I</span><span class="missing-if-branch" title="else path not taken" >E</span>if (this.g) {</span>
<span class="cstat-no" title="statement not covered" >      this.g.throw(new Error('Unsupported type'));</span>
<span class="cstat-no" title="statement not covered" >      return;</span>
    }
    this.consumed += n;
    if (this.g) this.demand(this.g.next(returnValue!).value, true);
    else if (this.resolve)
      this.resolve(returnValue);
    return returnValue!;
  }
  write(value: InputTypes) {
    if ('buffer' in value) {
      this.malloc(value.byteLength).set(new Uint8Array(value.buffer, value.byteOffset, value.byteLength));
    } else <span class="missing-if-branch" title="else path not taken" >E</span>{
<span class="cstat-no" title="statement not covered" >      this.malloc(value.byteLength).set(new Uint8Array(value));</span>
    }
    if (this.g || this.resolve) this.flush();
    //富余，需要等到饥饿
    else return new Promise&lt;void&gt;((resolve) =&gt; this.pull = resolve);
  }
  writeU32(value: number) {
    this.malloc(4).set([(value &gt;&gt; 24) &amp; 0xff, (value &gt;&gt; 16) &amp; 0xff, (value &gt;&gt; 8) &amp; 0xff, value &amp; 0xff]);
    this.flush();
  }
<span class="fstat-no" title="function not covered" >  writeU16(</span>value: number) {
<span class="cstat-no" title="statement not covered" >    this.malloc(2).set([(value &gt;&gt; 8) &amp; 0xff, value &amp; 0xff]);</span>
<span class="cstat-no" title="statement not covered" >    this.flush();</span>
  }
<span class="fstat-no" title="function not covered" >  writeU8(</span>value: number) {
<span class="cstat-no" title="statement not covered" >    this.malloc(1)[0] = value;</span>
<span class="cstat-no" title="statement not covered" >    this.flush();</span>
  }
  malloc(size: number): Uint8Array {
    if (this.buffer) {
      const l = this.buffer.length;
      const nl = l + size;
      if (nl &lt;= this.buffer.buffer.byteLength - this.buffer.byteOffset) {
        this.buffer = new Uint8Array(this.buffer.buffer, this.buffer.byteOffset, nl);
      } else {
        const n = new Uint8Array(nl);
        n.set(this.buffer);
        this.buffer = n;
      }
      return this.buffer.subarray(l, nl);
    } else {
      this.buffer = new Uint8Array(size);
      return this.buffer;
    }
  }
};</pre></td></tr></table></pre>

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